Use the same method of the Linux kernel to print the MX31 silicon version on boot.
Tested on a MX31PDK with a 2.0 silicon, where it shows:
CPU: Freescale i.MX31 at 531 MHz MX31 silicon rev 2.0
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- Changes since v2: - Use macro instead of defines for IMX_CHIP_REVISION Changes since v1: - rename the CPU detect function name to get_cpu_rev - Use struct to access iim register arch/arm/cpu/arm1136/mx31/generic.c | 18 ++++++++++++++++ arch/arm/include/asm/arch-mx31/imx-regs.h | 20 ++++++++++++++++++ arch/arm/include/asm/imx_soc_revision.h | 31 +++++++++++++++++++++++++++++ 3 files changed, 69 insertions(+), 0 deletions(-) create mode 100644 arch/arm/include/asm/imx_soc_revision.h
diff --git a/arch/arm/cpu/arm1136/mx31/generic.c b/arch/arm/cpu/arm1136/mx31/generic.c index fa07fec..cfcb3d8 100644 --- a/arch/arm/cpu/arm1136/mx31/generic.c +++ b/arch/arm/cpu/arm1136/mx31/generic.c @@ -24,6 +24,7 @@ #include <common.h> #include <asm/arch/imx-regs.h> #include <asm/io.h> +#include <asm/imx_soc_revision.h>
static u32 mx31_decode_pll(u32 reg, u32 infreq) { @@ -106,11 +107,28 @@ void mx31_set_pad(enum iomux_pins pin, u32 config)
}
+void get_cpu_rev(void) +{ + u32 i, srev; + + /* read SREV register from IIM module */ + struct iim_regs *iim = (struct iim_regs *)MX31_IIM_BASE_ADDR; + srev = readl(&iim->iim_srev); + + for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++) + if (srev == mx31_cpu_type[i].srev) { + printf("MX31 silicon rev %s\n", mx31_cpu_type[i].v); + return; + } + printf("Unknown CPU identifier. srev = %02x\n", srev); +} + #if defined(CONFIG_DISPLAY_CPUINFO) int print_cpuinfo (void) { printf("CPU: Freescale i.MX31 at %d MHz\n", mx31_get_mcu_main_clk() / 1000000); + get_cpu_rev(); return 0; } #endif diff --git a/arch/arm/include/asm/arch-mx31/imx-regs.h b/arch/arm/include/asm/arch-mx31/imx-regs.h index 37337f2..6401a37 100644 --- a/arch/arm/include/asm/arch-mx31/imx-regs.h +++ b/arch/arm/include/asm/arch-mx31/imx-regs.h @@ -84,6 +84,24 @@ struct wdog_regs { u16 wrsr; /* Reset Status */ };
+/* IIM Control Registers */ +struct iim_regs { + u32 iim_stat; + u32 iim_statm; + u32 iim_err; + u32 iim_emask; + u32 iim_fctl; + u32 iim_ua; + u32 iim_la; + u32 iim_sdat; + u32 iim_prev; + u32 iim_srev; + u32 iim_prog_p; + u32 iim_scs0; + u32 iim_scs1; + u32 iim_scs2; + u32 iim_scs3; +};
#define IOMUX_PADNUM_MASK 0x1ff #define IOMUX_PIN(gpionum, padnum) ((padnum) & IOMUX_PADNUM_MASK) @@ -480,6 +498,8 @@ enum iomux_pins { #define CCMR_FPM (1 << 1) #define CCMR_CKIH (2 << 1)
+#define MX31_IIM_BASE_ADDR 0x5001C000 + #define PDR0_CSI_PODF(x) (((x) & 0x1ff) << 23) #define PDR0_PER_PODF(x) (((x) & 0x1f) << 16) #define PDR0_HSP_PODF(x) (((x) & 0x7) << 11) diff --git a/arch/arm/include/asm/imx_soc_revision.h b/arch/arm/include/asm/imx_soc_revision.h new file mode 100644 index 0000000..580b27e --- /dev/null +++ b/arch/arm/include/asm/imx_soc_revision.h @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2011 Freescale Semiconductor, Inc. + * + * Fabio Estevam fabio.estevam@freescale.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation; + */ + +#define IMX_CHIP_REVISION(maj, min) ((maj) * 16 + (min)) + + +struct mx3_cpu_type { + u8 srev; + const char *name; + const char *v; + unsigned int rev; +}; + +struct mx3_cpu_type mx31_cpu_type[] = { + { .srev = 0x00, .name = "i.MX31(L)", .v = "1.0", .rev = IMX_CHIP_REVISION(1, 0) }, + { .srev = 0x10, .name = "i.MX31", .v = "1.1", .rev = IMX_CHIP_REVISION(1, 1) }, + { .srev = 0x11, .name = "i.MX31L", .v = "1.1", .rev = IMX_CHIP_REVISION(1, 1) }, + { .srev = 0x12, .name = "i.MX31", .v = "1.15", .rev = IMX_CHIP_REVISION(1, 1) }, + { .srev = 0x13, .name = "i.MX31L", .v = "1.15", .rev = IMX_CHIP_REVISION(1, 1) }, + { .srev = 0x14, .name = "i.MX31", .v = "1.2", .rev = IMX_CHIP_REVISION(1, 2) }, + { .srev = 0x15, .name = "i.MX31L", .v = "1.2", .rev = IMX_CHIP_REVISION(1, 2) }, + { .srev = 0x28, .name = "i.MX31", .v = "2.0", .rev = IMX_CHIP_REVISION(2, 0) }, + { .srev = 0x29, .name = "i.MX31L", .v = "2.0", .rev = IMX_CHIP_REVISION(2, 0) }, +};